[SteveDallas]

I received this little ditty in the mail. Just for my own perverse interest, is there any good way to figure out what the output is without actually running it? (I have replaced '< >' with '{ }' for obvious reasons.)

{script language="JavaScript"}
expedition = new Array(47,
56,61,35,3,66,8,80,134,98,140,
44,91,118,210,214,122,190,180,244,82,
166,73,122,91,249,157,191,48,42,16,
64,144,213,71,218,42,174,199,132,87,
174,14,232,51,84,238,123,153,133,164,
124,10,46,117,9,52,148,190,68,10,
134,46,132,149,32,57,62,31,30,251,
91,107,96,14,178,7,147,52,32,143,
108,89,237,87,41,21,131,104,120,132,
177,55,55,207,47,185,36,168,34,67,
176,133,45,110,193,102,14,84,20,108,
227,145,128,9,81,170,130,81,121,59,
249,223,178,215,44,140,209,179,159,135,
139,207,179,195,250,95,160,78,245,162,
180,117,123,196,72,25,46,150,120,182,
91,21,13,110,57,51,76,25,206,59,
161,114,47,85,233,146,78,193,242,187,
127,233,35,79,41,193,252,220,26,5,
99,66,164,241,103,250,111,136,170,154,
40,157,44,168,103,72,178,116,140,142,
237,96,3,35,37,84,86,242,237,70,
23,197,97,171,180,126,52,44,76,89,
171,110,46,90,99,216,27,178,18,28,
183,96,10,215,101,9,8,232,14,122,
145,245,120,104,130,80,142,82,202,40,
73,172,149,74,27,170,31,14,66,102,
125,156,226,237,28,62,182,159,53,102,
82,246,213,165,182,61,225,162,192,152,
140,238,166,175,136,208,70,169,83,244,
174,209,121,18,194,78,125,94,151,109,
166,51,17,105,5,38,56,41,122,201,
61,213,6,52,92,248,146,75,193,237,
187,12,140,61,79,41,184,162,147,15,
100,97,43,181,245,9,239,1,152,197,
243,56,232,45,201,8,63,212,92,164,
192,223,17,109,44,20,74,20,182,148,
22,121,237,74,138,135,29,3,93,123,
125,139,94,101,8,97,178,111,149,41,
82,138,19,89,233,87,41,123,234,111,
16,248,197,55,83,168,96,224,57,189,
43,47,223,234,55,110,219,1,15,73,
20,21,147,237,228,0,48,223,236,66,
111,59,232,208,191,165,68,157,199,220,
128,133,139,226,246,201,149,68,163,72,
232,160,180,123,125,209,32,106,59,135,
12,160,67,112,12,24,42,46,92,30,
202,49,173,6,38,88,241,146,71,193,
224,208,127,140,50,67,45,221,209,131,
4,100,98,44,182,144,106,230,14,146,
166,255,71,232,40,192,103,35,216,50,
165,161,208,18,19,44,12,37,14,245,
219,122,120,247,72,226,157,95,93,70,
102,114,130,54,107,97,7,198,126,155,
40,82,135,15,89,251,81,40,21,159,
107,120,249,217,88,79,164,108,244,80,
188,62,47,203,236,46,99,168,117,14,
66,20,17,147,231,249,121,81,173,236,
88,107,85,152,222,176,215,39,133,205,
218,147,140,226,207,165,202,143,6,226,
82,242,174,216,113,18,207,79,106,59,
255,98,186,71,24,0,0,40,82,37,
122,202,72,195,111,32,52,237,254,86,
211,153,183,12,140,44,69,46,184,182,
147,3,100,121,45,211,227,108,235,111,
139,173,251,63,232,53,206,2,45,189,
94,172,175,210,83,53,64,28,33,30,
214,255,24,25,244,65,135,146,67,76,
46,108,115,136,95,107,105,15,162,7,
151,53,55,128,11,89,234,87,37,102,
234,116,13,229,184,57,42,172,2,251,
63,189,78,92,200,224,59,102,209,1,
8,78,115,21,134,131,225,14,95,182,
152,70,10,66,247,196,202,216,2,162,
236,231,238,245,225,159,194,136,208,55,
152,33,199,139,253,90,92,190,34,90,
27,177,88,144,97,114,119,114,9,19,
107,46,171,27,232,92,2,41,159,135,
33,160,218,145,51,195,7,55,89,187,
183,144,103,116,29,82,209,142,21,207,
111,180,151,223,13,245,67,238,51,0,
237,40,204,207,238,41,72,34,54,6,
62,153,163,91,86,208,101,236,177,121,
115,33,85,19,160,96,100,25,113,214,
23,228,77,45,134,26,87,214,107,1,
89,232,5,27,253,223,84,79,224,40,
251,53,187,43,47,200,234,90,120,205,
100,102,78,96,125,154,236,247,121,87,
171,236,66,101,73,243,194,202,216,5,
243,190,188,182,166,160,155,194,185,245,
123,214,12,172,219,246,79,12,142,10,
5,28,173,18,248,25,108,43,60,81,
113,15,102,233,26,191,43,109,40,223,
192,61,141,179,194,61,222,75,7,113,
164,147,164,105,73,39,94,145,194,23,
163,69,209,239,134,68,170,14,226,62,
74,144,24,238,234,165,113,87,120,56,
6,101);
shutdowns = new Array(19,
80,73,78,111,124,5,90,139,104,129,
38,103,20,189,178,3,128,185,254,95,
172,117,10,123,152,241,214,87,68,45,
98,243,176,41,174,79,220,229,186,107,
200,97,134,71,116,157,18,227,224,153,
94,63,12,85,106,91,248,209,54,55,
164,13,194,211,16,9,14,47,60,197,
26,75,40,65,230,39,212,125,114,195,
64,121,190,31,108,53,202,59,88,177,
150,23,4,237,34,179,112,233,110,15,
156,165,122,43,136,33,70,7,52,93,
210,163,160,89,30,255,204,21,42,27,
184,145,246,247,100,205,130,147,208,201,
206,239,252,133,218,11,232,1,166,231,
148,61,50,131,0,57,126,223,44,245
);
blasphemous = 963;
processes = 151;
var gasped = "";
for(genders = 0; genders < blasphemous; genders++)
gasped = gasped + String.fromCharCode(expedition[genders] ^ shutdowns[genders % processes]);
document.write(gasped);
{/script}